# encoding:utf-8

def repElement(l):
	d = dict()
	s = set()
	if isinstance(l, list):
		for i in l:
			d[i] = d.setdefault(i, 0) + 1
			s.add(i)
	else:
		print('{} is not list'.format(l))
	for k,v in d.items():
		if v >= 2:
			print("{}:{}".format(k,v))
	print('new set():{}'.format(s))
	
		
		
repElement(['a', 'a', 'b', 1, 'c', 2, 3, '4', 'b', 3, 2])